Enhanced two-photon absorption of CdS nanocrystal rods

被引：49

作者：

Li, Xiangping ^{[1
]}

van Embden, Joel ^{[1
]}

Chon, James W. M. ^{[1
]}

Gu, Min ^{[1
]}

机构：

[1] Swinburne Univ Technol, Ctr Microphoton, Fac Engn & Ind Sci, Hawthorn, Vic 3122, Australia

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 10期

基金：

澳大利亚研究理事会;

关键词：

cadmium compounds; fluorescence; II-VI semiconductors; nanostructured materials; nanotechnology; two-photon spectra; wide band gap semiconductors; EXCITATION CROSS-SECTIONS; QUANTUM RODS; SEMICONDUCTOR NANOCRYSTALS; OPTICAL NONLINEARITIES; CDTE; ULTRAFAST; PROBES;

D O I：

10.1063/1.3100196

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this letter we report that CdS nanocrystals are reshaped into an elongated rod form for increasing two-photon absorption. CdS quantum rods with uniform rod dimensions have been synthesized and their two-photon absorption cross section in solution has been characterized using the z-scan method and the two-photon induced fluorescence study. The absorption cross section was found to be 20.9x10(-46) cm(4)/s photon(-1) under two-photon excitation at wavelength 800 nm, which is an order of magnitude larger than that of CdS quantum dots of similar diameters. The higher two-photon absorption coefficient establishes the potential of this class of quantum rods for various photonic applications.

引用

页数：3

共 24 条

[1] Design of organic molecules with large two-photon absorption cross sections [J].

Albota, M ;

Beljonne, D ;

Brédas, JL ;

Ehrlich, JE ;

Fu, JY ;

Heikal, AA ;

Hess, SE ;

Kogej, T ;

Levin, MD ;

Marder, SR ;

McCord-Maughon, D ;

Perry, JW ;

Röckel, H ;

Rumi, M ;

Subramaniam, C ;

Webb, WW ;

Wu, XL ;

Xu, C .

SCIENCE, 1998, 281 (5383) :1653-1656

[2] Two-photon fluorescence excitation cross sections of biomolecular probes from 690 to 960 nm [J].

Albota, MA ;

Xu, C ;

Webb, WW .

APPLIED OPTICS, 1998, 37 (31) :7352-7356

[3] Semiconductor clusters, nanocrystals, and quantum dots [J].

Alivisatos, AP .

SCIENCE, 1996, 271 (5251) :933-937

[4] Single-molecule spectroscopy with 27 fs pulses: Time-resolved experiments and direct imaging of orientational distributions [J].

Bopp, MA ;

Jia, Y ;

Haran, G ;

Morlino, EA ;

Hochstrasser, RM .

APPLIED PHYSICS LETTERS, 1998, 73 (01) :7-9

[5] Two-photon-induced photoenhancement of densely packed CdSe/ZnSe/ZnS nanocrystal solids and its application to multilayer optical data storage [J].

Chon, JWM ;

Zijlstra, P ;

Gu, M ;

van Embden, J ;

Mulvaney, P .

APPLIED PHYSICS LETTERS, 2004, 85 (23) :5514-5516

[6] Three-photon excited band edge and trap emission of CdS semiconductor nanocrystals [J].

Chon, JWM ;

Gu, M ;

Bullen, C ;

Mulvaney, P .

APPLIED PHYSICS LETTERS, 2004, 84 (22) :4472-4474

[7] Use of two-photon excitation for erasable-rewritable three-dimensional bit optical data storage in a photorefractive polymer [J].

Day, D ;

Gu, M .

OPTICS LETTERS, 1999, 24 (14) :948-950

[8]

Gu M., 1996, PRINCIPLES 3 DIMENSI, DOI [10.1142/3014, DOI 10.1142/3014]

[9] Three-photon absorption in ZnO and ZnS crystals [J].

He, J ;

Qu, YL ;

Li, HP ;

Mi, J ;

Ji, W .

OPTICS EXPRESS, 2005, 13 (23) :9235-9247

[10] Ultrafast and large third-order nonlinear optical properties of CdS nanocrystals in polymeric film [J].

He, J ;

Ji, W ;

Ma, GH ;

Tang, SH ;

Kong, ESW ;

Chow, SY ;

Zhang, XH ;

Hua, ZL ;

Shi, JL .

JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (10) :4373-4376

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